Dead spot

We found this spot on 17 green last week.  It looks like a beer spill or urine.  Yes Beer will kill grass especially Bentgrass greens.  Urine will also kill turf.  We are not sure what killed the grass on 17 green.  Looks like some thing was dumped out on the green so we are leaning toward a beer spill.  Please do not carry any beverage on the greens.